How Does a Hock Noise Filter Work?
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Sound
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To get a perspective on just how effective Hocks Noise Filters are, you have to know a thing or two about sound and physics. The first thing to be familiar with is sound. After all, it is sound that you'll be avoiding if you wear these ear plugs. First, there are two types of these sound reducers: the EP3 and the EP4.
The EP3 has a noise reduction rating of 16 decibels. Decibels are not straight measurements of sound, but are instead logarithms. For instance, a difference of 10 decibels means that there's a difference of 10 times the amount of sound. So 70 decibels is 10 times louder than 60 decibels. That means the EP3 can reduce the sound from the outside of your ear, going to the inside of your ear, by 16 times. And the EP4 can do even more, with a noise reduction rating of 19 decibels.
Physics
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There are four laws in the physical science of thermodynamics. We'll be concerned with the first one (or the second one, if you're counting the first one as the zeroth law of thermodynamics). This law states that energy can neither be created, nor destroyed. It deals with the transfer of heat, but has become an important law in all physical sciences, since everything is energy.
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Putting It All Together
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The Hocks Noise Filter is specifically designed to reduce sound. The way this is done, is through the first law of thermodynamics. It converts sound into heat. It basically turns one form of energy into another. It's also specifically designed to deflect sound waves back out, so that sound waves coming in will be burned up and canceled out. Those burned up sound waves are the source of the heat, which is then absorbed by the earplugs. Of course the energy that's transformed into heat will be too small to feel. But they certainly get the job done.
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